0000000000054333

AUTHOR

Rainer Thomae

showing 2 related works from this author

Inner shell ionization of argon in ECRIS plasma

2018

Abstract The volumetric K α emission rate of argon emitted from the electron cyclotron resonance (ECR) heated plasmas of the JYFL (University of Jyvaskyla, Department of Physics) 14 GHz ECR ion source (ECRIS) and the 14.5 GHz Grenoble Test Source (GTS) at iThemba Laboratory for Accelerator Based Sciences have been measured to gain an understanding of the influence of the ion source tune parameters on the absolute inner shell ionization rate. It was observed that the behaviour of the ionization rate and the extracted ion beam currents react differently, depending the parametric sweep performed. The neutral gas pressure and incident microwave power was found to have the strongest influence on…

Nuclear and High Energy PhysicsIon beamchemistry.chemical_elementplasmafysiikka01 natural sciencesinner shell ionization rateElectron cyclotron resonance010305 fluids & plasmasIonPhysics::Plasma PhysicsIonization0103 physical sciences010306 general physicsInstrumentationplasmaplasma (kaasut)PhysicsArgonta114volumetric emission ratePlasmaIon sourceECRISchemistryargonAtomic physicsMicrowaveNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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Investigation into the gas mixing effect in ECRIS plasma using Kα and optical diagnostics

2018

Mixing a lighter gas species into the plasma of an ECRIS is known to enhance high charge state production of the heavier gas species. With this investigation, Kα diagnostics, optical emission spectroscopy and the measured charge state distribution of the extracted beam were combined to shed more light on the physics governing this phenomenon. Kα diagnostics data from two ion sources, the JYFL 14 GHz ECRIS and the GTS at iThemba LABS, are presented to gain confidence on the observed trends. The results seem to favor ion cooling as the most likely mechanism responsible for the favorable influence of the gas mixing.Mixing a lighter gas species into the plasma of an ECRIS is known to enhance hi…

Materials scienceta114ionitsyklotronitPlasmaplasmafysiikkaGas mixingIonNuclear physicsOptical diagnosticsIon coolingionsOptical emission spectroscopycyclotron resonanceState distributionplasmaplasma (kaasut)Beam (structure)AIP Conference Proceedings
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